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WELLENÜBERWACHUNGSSYSTEM

Patentnummer:EP3686561B1
IPC Hauptklasse:G01D5/14
Anmelder:ROLLS ROYCE PLC (1)
Erfinder:ANELLI DOMINIC (1)
ANELLI DOMINIC J (1)
LISTIANTO JULIUS (1)
LISTIANTO JULIUS K (1)
RODGERS KAREEM (1)
RODGERS KAREEM W (1)
WOOD LAURA (1)
WOOD LAURA E (1)
Anmeldung:03.01.20
Patenterteilung:17.11.21
Einspruch bis:17.08.22

Abstract / Hauptanspruch
A monitoring system is provided for monitoring the axial position of a rotating shaft. The system includes first and second, axially adjacent, phonic wheels which are formed from respective axially adjacent portions of a unitary annular body and mounted coaxially to the shaft for rotation therewith. The first and second phonic wheels have respective first and second circumferential rows of teeth. The system further includes a sensor configured to detect the passage of the first row of teeth by generating a first alternating measurement signal component, and to detect the passage of the second row of teeth by generating a second alternating measurement signal component. The sensor generates a signal having both the first and the second alternating measurement signal components when axially positioned midway between the first and second phonic wheels. The teeth of the first and second rows are configured such that the first alternating measurement signal component generated by the sensor has an identical frequency to the second alternating measurement signal component generated by the sensor. The first and second rows of teeth are angularly misaligned such that the first and second alternating measurement signal components are phase shifted relative to each other. Axial displacement of the shaft causes the signal generated by the sensor to vary the amplitude of the first component relative to the amplitude of the second component whereby the axial position of the shaft can be monitored.


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